Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe update behind the October 22, 2025 headline was a security and stability patch, not One UI 8 Watch. It carried the August 2025 security patch and initially rolled out to Bluetooth Galaxy Watch4 and Watch4 Classic models. Samsung later delivered the bigger upgrade: One UI 8 Watch, based on Wear OS 6, appeared for the Watch4 series in December 2025. As of August 18, 2026, Samsung’s records show later updates too, although availability depends on the exact model and region.
What the October 2025 update actually included
The October update was first reported in South Korea for Bluetooth versions of the Galaxy Watch4 and Watch4 Classic. Its focus was security and stability; it was not the One UI 8 Watch feature release. The original report listed these builds:
| Watch model | Model number | October 2025 build |
|---|---|---|
| Galaxy Watch4 40mm | SM-R860 | R860XXU1IYI1 |
| Galaxy Watch4 44mm | SM-R870 | R870XXU1IYI1 |
| Galaxy Watch4 Classic 40mm | SM-R880 | R880XXU1IYI1 |
| Galaxy Watch4 Classic 44mm | SM-R890 | R890XXU1IYI1 |
Phandroid’s October 22, 2025 report described the update as carrying the August 2025 security patch. Its appearance in Samsung’s update history alongside platform notation referring to Android Wear 6 did not mean the One UI 8 Watch feature package was included.
Wear OS 6 and One UI 8 Watch are related, not interchangeable
Wear OS 6 is the underlying Google wearable platform version. One UI 8 Watch is Samsung’s interface and feature layer built on that platform. An update record may identify the platform without indicating that a particular Samsung feature release has arrived; the October IYI1 patch is one such case.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
When the Galaxy Watch4 got One UI 8 Watch
Samsung’s official update history for the Galaxy Watch4 44mm Wi-Fi model SM-R870 lists the actual One UI 8 Watch upgrade separately. Build R870XXU1JYK4 was released on December 22, 2025, with Android/Wear OS version 6.0 and an October 1, 2025 security patch.
Samsung’s notes for that release call out two changes:
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
- Now bar: ongoing tasks can appear at the bottom of the watch face.
- Double-pinch gestures: use a double pinch for actions such as scrolling notifications, controlling music, or taking pictures. Samsung also notes that the gesture behavior can be customized in several watch contexts.
Those notes are for the cited model’s record, not a guarantee that every feature is available on every Watch4 variant, in every country, or with every phone. Samsung says update changes can vary by model, country, and service provider.
Watch4 update timeline through August 2026
The clearest dated sequence in Samsung’s official history is for SM-R870. It shows that the October 2025 patch was followed by the major platform upgrade and then additional updates:
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
| Release date | Build (SM-R870) | Platform / security patch | Release type |
|---|---|---|---|
| October 2025 | R870XXU1IYI1 | August 2025 security patch | Security and stability update; not One UI 8 Watch |
| December 22, 2025 | R870XXU1JYK4 | Wear OS 6.0; October 1, 2025 security patch | One UI 8 Watch upgrade |
| January 27, 2026 | R870XXU1JYL6 | Wear OS 6.0; January 1, 2026 security patch | Follow-up update |
| March 26, 2026 | R870XXU2JZC2 | Wear OS 6.0; February 5, 2026 security patch | Follow-up update |
| June 22, 2026 | R870XXS2JZE1 | Wear OS 6.0; May 5, 2026 security patch | Latest dated build in this SM-R870 record |
These dates and build numbers come from Samsung’s update history for SM-R870. A separate Samsung Japan version listing also shows the ZE1 release dated June 22, 2026 for Watch4 and Watch4 Classic model families. That regional listing does not establish simultaneous availability for every model or in the United States.
Which Watch4 model should you check?
The model number matters as much as the product name. The October 2025 report identifies Wi-Fi/Bluetooth model numbers SM-R860, SM-R870, SM-R880, and SM-R890. LTE variants can have different model numbers and may receive firmware on a different schedule. Watch4 Classic case-size names also differ across regional documentation, so use the model number shown on your own watch rather than inferring eligibility from “40mm” or “44mm” alone.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Samsung’s detailed history cited above is for SM-R870. It is useful evidence of the Watch4’s later upgrade path, but its specific build sequence should not be assumed to apply unchanged to every LTE SKU, country, or carrier.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to check for an update
On the watch
- Open Settings.
- Tap Software update.
- Choose Download and install, or the equivalent update control shown on your watch.
- Keep the watch sufficiently charged and connected as prompted; let it restart and finish installing without interruption.
In Galaxy Wearable
- Open the Galaxy Wearable app on the connected phone.
- Select your watch.
- Open Watch settings, then Watch software update.
- Tap Download and install.
Menu wording may vary with the phone, app, language, and software version. Compare the build shown on your own device with Samsung’s update record for that exact model number; do not use the SM-R870 record as a universal firmware list.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchBest Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
If no update appears
A missing update does not by itself show that the watch is unsupported. Rollouts can vary by country and service provider, LTE firmware can follow a different schedule from Bluetooth firmware, and Samsung may list a release for one model number before another. The watch may also already have a later build than the October IYI1 version.
- Check the model number and current software build on the watch before comparing update records.
- Restart both watch and phone, make sure Galaxy Wearable is up to date, reconnect the watch if needed, and check again.
- Keep the devices close together and follow the update prompts. If installation fails, confirm the watch has enough available storage.
- If the update still does not appear, contact Samsung support with the model number and current build. A factory reset should not be the first troubleshooting step.
Is it worth keeping or buying a Galaxy Watch4?
From a software perspective, the later Wear OS 6-based One UI 8 Watch release makes the Watch4’s outlook better than the October 2025 headline alone suggested. Samsung’s available update history confirms that release and subsequent updates, but does not provide a definitive formal end-of-support statement. One UI 8 Watch therefore appears to be the Watch4’s final major platform upgrade based on the update history currently available—not a guarantee from Samsung that no further platform upgrade will come.
For an owner whose watch works well, the October IYI1 patch alone was no reason to replace it, and the later platform upgrade strengthens the case for keeping it. A used-watch buyer should weigh the actual condition of the battery and display, performance, sensor hardware, repairability, and the device’s regional firmware history. The fact that a Watch4 received Wear OS 6 does not establish how long it will receive future updates.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
